Panic-bolt dog.



N. B. HURD.

PANIC BOLT DOG.

APPLICATION FILED FEB. 5, 1916.

1,213JLU5. Patented. Jan.16,1917.

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0777mm Z Hard mmma N. B. HURD.

PANIC BOLT DOG.

APPLICATION FILED EEB.5|1916.

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14 m: 1 mslm Patnted Jan.16,1917.

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NORMAN B. HURD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR T0 TI-IE AMERICAN CONNECTICUT.

CORPORATION OF PANIC-BOLT DOG.

Specification of Letters Patent.

Patented Jan. 16, 1917.

Application filed February 5, 1916. Serial No. 76,338.

To all whom it may concern:

Be it known that I, NORMAN B. Hum), a citizen of the United States of America, residing at New Britain, Connecticut, have invented a new and useful Panic-Bolt Dog, of which the following is a specification.

My invention relates to improvements in door locks and consists particularly in providing means for holding the bolt operat ing member in a position to hold the bolt retracted. Ordinarily the normal position of a latch bolt is protracted. Sometimes it is desirable to have the latch bolt retracted for zt'time. To that end my invention contemplates the provision of simple and effective means for holding back the latch.

In the drawings: Figure 1 is a front elevation of a lock of the so called panic-bolt type. Fig. 2 is a relatively enlarged rear elevation of part of the mechanism. Fig. 3 is a similar view showing the same parts in another position. Fig. 4 is a section on the plane of the line 4-4, Fig. 3. Figs. 5, 6 and 7, are details.

In the particular lock shown herein, 1 represents a latch bolt which is normally spring projected in the usual manner. In this particular case the latch bolt is operated by a swinging member or handle which includes one or more outwardly projecting side-bars 2-2 connected by a cross bar 3. The side-bars 2---.2 are mounted in suitable brackets 44 respectively on the door. In this particular instance my hold back or dogging mechanism, by which the latch 1 may be held retracted, is mounted in the bracket 4 so as to be directly associated with the arm 2 although its location may of course be varied at will. As shown in Fig. 4 the handle 2 is pivotally mounted at 5 and has an inwardly projecting arm 6.

7 is a swinging dog (see Figs. 2, 3 and 6) which is suitably mounted in the bracket 4* adjacent to the mounting of the bolt operating member. In this particular instance the dog 7 is mounted rotatably on the end of a rotatable plug 8 of a cylinder lock which is directly carried by the bracket 4. The dog is provided with a lug 9 which stands in the path of a lug 10 on the end of the plug 8 so that when the plug has been turned sufliciently in a clockwise direction, as viewed in Fig. 3, it will swing the dog 7 into the dogging position shown therein, wherein the end of the dog will engage the end 6 of the latch operating member, so that the latch will be held back.

If the plug 8 is rotated in a oounterclockwise direction, the lug 9 will strike against the opposite side of the lug 10 and will swing the dog 7 into the bolt releasing position shown in Fig. 2. I may also pro vide a hold-out device to prevent the dog 7 from being moved excepting when the arm 2 is in the bolt retracting position shown in Figs. 3 and 4. This hold-out device may comprise an arm 11 pivoted at 12 and spring pressed into the position shown in Fig. 2, wherein it stands underneath the arm or dog 7 so that said dog cannot be shifted at such a time. This arm 11 may also stand in the path of the end of the arm 6 so that when said arm is being swung up from the dotted line position shown in Fig. 4 to the solid line position shown therein, that is to say, when the arm 6 is moved to the bolt retracting position, it will shift the hold back 11 out of the way, as shown in F ig. 3 in which position the dog 7 may then be turned.

Any suitable tool may be employed for turning the plug 8. In this particularinstance the tool is in the form of a key 14 of the type adapted to a pin cylinder lock. The form of this tool, or operating device, is, however, immaterial.

Any suitable spring such as a spring 15 may be employed to normally move the handle arm 2 from the solid line position shown in Fig. 4 to the dotted line position shown therein. 16 is a removable block which affords one convenient means for mounting the hold-back arm 11, this block being detachably secured to the back of the bracket or frame by a suitable screw 17. This block likewise may provide abutment shoulders 18-18 for the spring 15 to limit the movement of its free end in the direction indicated in dotted lines Fig.4.

While I have shown my invention in its preferred form, it is obvious that it is susceptible of a wide range of modifications.

What I claim is:

1. In a lock of the character described, a latch bolt, a pivotally mounted latch bolt retracting means, a pivotally mounted dog adjacent thereto and arranged to operatively engage and hold the same in the latch retracting position, a hold back device movjati able into position preventing operation of said dog and means for shifting said hold back device out of said holding position;

2. In a lock of the character described, a pivotally mounted retracting lever, a pivoted dog arranged to engage and hold the retracting lever and a pivoted holding lever arranged to engage and hold the pivoted dog.

3. In a lock of the character described, a bracket, a bolt retracting member including a spring pressed arm pivotally mounted to swing in said bracket, a dogging device-pivota'lly mounted in said bracket and arranged to cooperate with said bolt retracting member to holdit in a predetermined position, and a key operated means cooperating with said dog to move the same from the dogging to the non-dogging position, With means on the bracket: to prevent the movement of said dog intoits operative position untilsaid arm has reached its predetermined position.

4. In a lock of the character described, a

, bracket, a movable bolt operating member carriedthereby, dogging means for saidbolt operating member comprising a swinging arm mounted in saidbracket adjacent to the mounting for said b'olt operating member, with means on the bracket to hold said dogging member against movement until said bolt operating member has been moved to a predetermined position, said holding means being operable by said bolt operating member. I

5. In a lock of the character described, a

bracket, a latch retracting lever comprising an arm pivotally mounted on said bracket, a dog pivotally mounted in said bracket on an axis at right angles to the pivot of the latch retracting lever and disposed at one side of the normal path of movement of the arm of the latch retracting lever and key operated means for rotating said dog on its pivot to carry the same into the path of movement of the arm of the latch retracting lever.

G. In a lock of the character described, a bracket, a latch retracting lever comprising an. arm pivotally mounted on said bracket.

a dogging device pivotally mounted on said bracket and arranged for cooperation with the arm of said retracting lever to hold the same in a predetermined position and a movable member mounted onthe bracket in a position to normally hold said dog in its non-dogging position and adapted to be shifted by the arm of the lever out of such holding position.

NORMAN B. IIURD.

Gopjesoi this patent may be obtained for. five cents each, by addressing the Commissioner of Patents,

' Washington,- D. C. 

